diff --git a/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java b/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
index a9f60ff1e6fa..893e7556c2f8 100644
--- a/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
+++ b/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
@@ -48,7 +48,11 @@ public class FlutterWebView implements PlatformView, MethodCallHandler {
 
     if (params.containsKey("initialUrl")) {
       String url = (String) params.get("initialUrl");
-      webView.loadUrl(url);
+      if (url.contains("://")) {
+        webView.loadUrl(url);
+      } else {
+        webView.loadUrl("file:///android_asset/flutter_assets/" + url);
+      }
     }
   }
 
@@ -63,6 +67,9 @@ public void onMethodCall(MethodCall methodCall, Result result) {
       case "loadUrl":
         loadUrl(methodCall, result);
         break;
+      case "loadAssetFile":
+        loadAssetFile(methodCall, result);
+        break;
       case "updateSettings":
         updateSettings(methodCall, result);
         break;
@@ -113,6 +120,12 @@ private void loadUrl(MethodCall methodCall, Result result) {
     result.success(null);
   }
 
+  private void loadAssetFile(MethodCall methodCall, Result result) {
+    String url = (String) methodCall.arguments;
+    webView.loadUrl("file:///android_asset/flutter_assets/" + url);
+    result.success(null);
+  }
+
   private void canGoBack(Result result) {
     result.success(webView.canGoBack());
   }
diff --git a/packages/webview_flutter/ios/Classes/FlutterWebView.h b/packages/webview_flutter/ios/Classes/FlutterWebView.h
index 08e6b8ab53a8..de78ed7be080 100644
--- a/packages/webview_flutter/ios/Classes/FlutterWebView.h
+++ b/packages/webview_flutter/ios/Classes/FlutterWebView.h
@@ -12,13 +12,13 @@ NS_ASSUME_NONNULL_BEGIN
 - (instancetype)initWithFrame:(CGRect)frame
                viewIdentifier:(int64_t)viewId
                     arguments:(id _Nullable)args
-              binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger;
+                    registrar:(NSObject<FlutterPluginRegistrar>*)registrar;
 
 - (UIView*)view;
 @end
 
 @interface FLTWebViewFactory : NSObject <FlutterPlatformViewFactory>
-- (instancetype)initWithMessenger:(NSObject<FlutterBinaryMessenger>*)messenger;
+- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar;
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/packages/webview_flutter/ios/Classes/FlutterWebView.m b/packages/webview_flutter/ios/Classes/FlutterWebView.m
index afc2f9921d05..d86e1ed53680 100644
--- a/packages/webview_flutter/ios/Classes/FlutterWebView.m
+++ b/packages/webview_flutter/ios/Classes/FlutterWebView.m
@@ -7,13 +7,15 @@
 #import "JavaScriptChannelHandler.h"
 
 @implementation FLTWebViewFactory {
+  NSObject<FlutterPluginRegistrar>* _registrar;
   NSObject<FlutterBinaryMessenger>* _messenger;
 }
 
-- (instancetype)initWithMessenger:(NSObject<FlutterBinaryMessenger>*)messenger {
+- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
   self = [super init];
   if (self) {
-    _messenger = messenger;
+    _registrar = registrar;
+    _messenger = registrar.messenger;
   }
   return self;
 }
@@ -28,7 +30,7 @@ - (instancetype)initWithMessenger:(NSObject<FlutterBinaryMessenger>*)messenger {
   FLTWebViewController* webviewController = [[FLTWebViewController alloc] initWithFrame:frame
                                                                          viewIdentifier:viewId
                                                                               arguments:args
-                                                                        binaryMessenger:_messenger];
+                                                                              registrar:_registrar];
   return webviewController;
 }
 
@@ -42,17 +44,20 @@ @implementation FLTWebViewController {
   // The set of registered JavaScript channel names.
   NSMutableSet* _javaScriptChannelNames;
   FLTWKNavigationDelegate* _navigationDelegate;
+  NSObject<FlutterPluginRegistrar>* _registrar;
 }
 
 - (instancetype)initWithFrame:(CGRect)frame
                viewIdentifier:(int64_t)viewId
                     arguments:(id _Nullable)args
-              binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger {
+                    registrar:(NSObject<FlutterPluginRegistrar>*)registrar {
   if ([super init]) {
     _viewId = viewId;
+    _registrar = registrar;
 
     NSString* channelName = [NSString stringWithFormat:@"plugins.flutter.io/webview_%lld", viewId];
-    _channel = [FlutterMethodChannel methodChannelWithName:channelName binaryMessenger:messenger];
+    _channel = [FlutterMethodChannel methodChannelWithName:channelName
+                                           binaryMessenger:registrar.messenger];
     _javaScriptChannelNames = [[NSMutableSet alloc] init];
 
     WKUserContentController* userContentController = [[WKUserContentController alloc] init];
@@ -77,7 +82,11 @@ - (instancetype)initWithFrame:(CGRect)frame
 
     NSString* initialUrl = args[@"initialUrl"];
     if ([initialUrl isKindOfClass:[NSString class]]) {
-      [self loadUrl:initialUrl];
+      if ([initialUrl rangeOfString:@"://"].location == NSNotFound) {
+        [self loadAssetFile:initialUrl];
+      } else {
+        [self loadUrl:initialUrl];
+      }
     }
   }
   return self;
@@ -92,6 +101,8 @@ - (void)onMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
     [self onUpdateSettings:call result:result];
   } else if ([[call method] isEqualToString:@"loadUrl"]) {
     [self onLoadUrl:call result:result];
+  } else if ([[call method] isEqualToString:@"loadAssetFile"]) {
+    [self onLoadAssetFile:call result:result];
   } else if ([[call method] isEqualToString:@"canGoBack"]) {
     [self onCanGoBack:call result:result];
   } else if ([[call method] isEqualToString:@"canGoForward"]) {
@@ -133,6 +144,17 @@ - (void)onLoadUrl:(FlutterMethodCall*)call result:(FlutterResult)result {
   }
 }
 
+- (void)onLoadAssetFile:(FlutterMethodCall*)call result:(FlutterResult)result {
+  NSString* url = [call arguments];
+  if (![self loadAssetFile:url]) {
+    result([FlutterError errorWithCode:@"loadAssetFile_failed"
+                               message:@"Failed parsing the URL"
+                               details:[NSString stringWithFormat:@"URL was: '%@'", url]]);
+  } else {
+    result(nil);
+  }
+}
+
 - (void)onCanGoBack:(FlutterMethodCall*)call result:(FlutterResult)result {
   BOOL canGoBack = [_webView canGoBack];
   result([NSNumber numberWithBool:canGoBack]);
@@ -289,6 +311,20 @@ - (bool)loadUrl:(NSString*)url withHeaders:(NSDictionary<NSString*, NSString*>*)
   return true;
 }
 
+- (bool)loadAssetFile:(NSString*)url {
+  NSString* key = [_registrar lookupKeyForAsset:url];
+  NSURL* nsUrl = [[NSBundle mainBundle] URLForResource:key withExtension:nil];
+  if (!nsUrl) {
+    return false;
+  }
+  if (@available(iOS 9.0, *)) {
+    [_webView loadFileURL:nsUrl allowingReadAccessToURL:[NSURL URLWithString:@"file:///"]];
+  } else {
+    return false;
+  }
+  return true;
+}
+
 - (void)registerJavaScriptChannels:(NSSet*)channelNames
                         controller:(WKUserContentController*)userContentController {
   for (NSString* channelName in channelNames) {
diff --git a/packages/webview_flutter/ios/Classes/WebViewFlutterPlugin.m b/packages/webview_flutter/ios/Classes/WebViewFlutterPlugin.m
index cab9169df00a..d2859a3d5d7c 100644
--- a/packages/webview_flutter/ios/Classes/WebViewFlutterPlugin.m
+++ b/packages/webview_flutter/ios/Classes/WebViewFlutterPlugin.m
@@ -5,8 +5,7 @@
 @implementation FLTWebViewFlutterPlugin
 
 + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
-  FLTWebViewFactory* webviewFactory =
-      [[FLTWebViewFactory alloc] initWithMessenger:registrar.messenger];
+  FLTWebViewFactory* webviewFactory = [[FLTWebViewFactory alloc] initWithRegistrar:registrar];
   [registrar registerViewFactory:webviewFactory withId:@"plugins.flutter.io/webview"];
   [FLTCookieManager registerWithRegistrar:registrar];
 }
diff --git a/packages/webview_flutter/lib/webview_flutter.dart b/packages/webview_flutter/lib/webview_flutter.dart
index 2f5bffc6704e..45a94c916029 100644
--- a/packages/webview_flutter/lib/webview_flutter.dart
+++ b/packages/webview_flutter/lib/webview_flutter.dart
@@ -429,6 +429,17 @@ class WebViewController {
     });
   }
 
+  /// Loads the specified file.
+  ///
+  /// `url` must not be null.
+  Future<void> loadAssetFile(String url) async {
+    assert(url != null);
+    // TODO(amirh): remove this on when the invokeMethod update makes it to stable Flutter.
+    // https://github.com/flutter/flutter/issues/26431
+    // ignore: strong_mode_implicit_dynamic_method
+    return _channel.invokeMethod('loadAssetFile', url);
+  }
+
   /// Accessor to the current URL that the WebView is displaying.
   ///
   /// If [WebView.initialUrl] was never specified, returns `null`.